JPH0194372A - Transfer device - Google Patents
Transfer deviceInfo
- Publication number
- JPH0194372A JPH0194372A JP25158787A JP25158787A JPH0194372A JP H0194372 A JPH0194372 A JP H0194372A JP 25158787 A JP25158787 A JP 25158787A JP 25158787 A JP25158787 A JP 25158787A JP H0194372 A JPH0194372 A JP H0194372A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- transfer paper
- paper
- toner image
- belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000013518 transcription Methods 0.000 claims description 2
- 230000035897 transcription Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 abstract description 5
- 239000012141 concentrate Substances 0.000 abstract 2
- 108091008695 photoreceptors Proteins 0.000 description 45
- 230000007547 defect Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
- G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
- G03G15/165—Arrangements for supporting or transporting the second base in the transfer area, e.g. guides
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明はベルト状の感光体を使用した複写機等に用い
られる転写装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transfer device used in a copying machine or the like using a belt-shaped photoreceptor.
［従来の技術］
従来、この種の転写装置としては、次に示すようなもの
がある。これは、第８図に示すように、複数のローラに
掛け回されるベルト状感光体４１の移動路の一部を、径
の大きなドライブロール４２と径の小さなストリップロ
ール４３によってコ字形状に形成し、ドライブロール４
２とストリップロール４３によってベルト状感光体４１
を平面状に支持する。そして、この平面状の転写エリア
Ａにおいて用紙ガイド４４を介して給送される転写用紙
（図示せず）を、転写コロトロン４５の帯電によってベ
ルト状感光体４１に密着させるとともに、ベルト状感光
体４１上に形成されたトナー画像を、転写コロトロン４
５の帯電によって転写用紙上に転写する。その後、ベル
ト状感光体４１と転写用紙との静電的な吸着力を、剥離
コロトロン４６の帯電によって弱め、この転写用紙を径
の小さなストリップロール４３の曲率と転写用紙自体の
剛性によってベルト状の感光体４１から分離するように
構成されている。[Prior Art] Conventionally, there are the following types of transfer devices of this type. As shown in FIG. 8, a portion of the moving path of the belt-shaped photoreceptor 41 that is wound around a plurality of rollers is formed into a U-shape by a drive roll 42 with a large diameter and a strip roll 43 with a small diameter. Form and drive roll 4
2 and the strip roll 43, the belt-shaped photoreceptor 41
is supported in a plane. Then, a transfer paper (not shown) fed through the paper guide 44 in this planar transfer area A is brought into close contact with the belt-shaped photoreceptor 41 by being charged by the transfer corotron 45, and the belt-shaped photoreceptor 41 The toner image formed on the transfer corotron 4
The image is transferred onto the transfer paper by charging step 5. Thereafter, the electrostatic adhesion force between the belt-shaped photoreceptor 41 and the transfer paper is weakened by charging the peeling corotron 46, and the transfer paper is separated into a belt-shaped form by the curvature of the small-diameter strip roll 43 and the rigidity of the transfer paper itself. It is configured to be separated from the photoreceptor 41.
［発明が解決しようとする問題点］
しかし、このような従来技術の場合には、次の・ よ
うな問題点を有している。すなわち、通常転写用紙は、
数百枚単位で給紙カセットにストックされており、複写
動作に応じて順次この給紙カセットから１枚ずつ給紙さ
れるようになっている。ところで、高湿下で転写用紙を
多数枚積重ねて長時間放置すると、空気と触れる最上層
の転写用紙は、−様に吸湿して伸びが均一であるのに対
し、上端部から約５０枚目以下の用紙は、周囲のみ吸湿
して延びるので、不均一に３次元変形する。[Problems to be solved by the invention] However, such prior art has the following problems. In other words, normal transfer paper is
Several hundred sheets are stocked in a paper feed cassette, and sheets are sequentially fed one by one from this paper feed cassette in response to copying operations. By the way, when many sheets of transfer paper are stacked and left for a long time in a high humidity environment, the top layer of transfer paper that comes into contact with the air absorbs moisture and stretches evenly, whereas the paper that comes in contact with the air absorbs moisture and stretches evenly. The paper below absorbs moisture only at the periphery and expands, so it deforms non-uniformly in three dimensions.
ところで、この変形した転写用紙をベルト状感光体を用
いた複写機で使用すると、第９図に示すように、転写用
紙４７後端部の画像に転写不良Ｂが発生し、転写用紙４
７の後端に画“像の抜けが生じるという問題点がある。By the way, when this deformed transfer paper is used in a copying machine using a belt-shaped photoreceptor, a transfer defect B occurs in the image at the rear end of the transfer paper 47, as shown in FIG.
There is a problem in that an image is missing at the rear end of 7.
この転写不良は、次のようにして起こる。すなわち、ベ
ルト状感光体から転写用紙上にトナー像を転写する際、
転写用紙は、ベルト状感光体４１に転写コロトロン４５
の帯電によって静電的に吸着され、ベルト状感光体４１
とともに移動する。その際、転写用紙が周辺部のみ吸湿
して伸びていると、転写用紙の送り方向に対して直交す
る幅方向の中央部に比べて、両端部の用紙の長さが長く
なるため、相対的に転写用紙の中央部より両端部の搬送
が遅れる。そのため、転写用紙が先端側から順次送られ
ベルト状感光体４１に静電的に吸着して搬送される際に
、転写用紙の中央部のみ速く送られ、両端部の搬送が遅
れるため、転写用紙の後端部においては、その中央部が
先端側へ引張られ、両端部が中央部へ移動して変形が集
められ、転写用紙４７の中央部が第１０図に示すように
ベルト状感光体４１の表面から浮上り、転写不良が発生
するのである。This transfer defect occurs as follows. That is, when transferring a toner image from a belt-shaped photoreceptor onto transfer paper,
The transfer paper is transferred to a belt-shaped photoreceptor 41 by a transfer corotron 45.
is electrostatically attracted to the belt-shaped photoreceptor 41
move with At this time, if the transfer paper absorbs moisture and stretches only at the periphery, the length of the paper at both ends will be longer than at the center in the width direction perpendicular to the transfer direction, so the relative The conveyance of both ends of the transfer paper is delayed compared to the center of the transfer paper. Therefore, when the transfer paper is sequentially fed from the leading edge side and is electrostatically attracted to the belt-like photoreceptor 41 and transported, only the center part of the transfer paper is fed quickly, and the transport of both ends is delayed. At the rear end, the central part is pulled toward the leading end, and both ends move toward the central part to collect the deformation, and the central part of the transfer paper 47 is moved to the belt-like photoreceptor 41 as shown in FIG. This causes the particles to float up from the surface, causing transfer defects.
［問題点を解決するための手段］
そこで、この発明は、上記従来技術の問題点を解決する
ためのなされたもので、その目丙とするところは、転写
用紙が不均一に吸湿して変形した場合でも、転写不良が
発生することのない転写装置を提供することにある。[Means for Solving the Problems] Therefore, the present invention has been made to solve the above-mentioned problems of the prior art. It is an object of the present invention to provide a transfer device that does not cause transfer defects even when
すなわち、この発明は、複数のａ−ラ間に掛け回された
ベルト状のトナー像担持体に、転写体を転写エリアで密
着させ、前記トナー像担持体からトナー像を転写体に電
気的に転写する転写装置において、前記転写体を転写エ
リアでトナー像担持体に押圧させる機構を備え、前記押
圧させる機構によって、転写体がトナー像担持体に密着
した際、転写体の変形を防止するように構成されている
。That is, in the present invention, a transfer member is brought into close contact with a belt-shaped toner image carrier stretched between a plurality of a-ra in a transfer area, and a toner image is electrically transferred from the toner image carrier to the transfer member. The transfer device for transferring includes a mechanism for pressing the transfer body against the toner image carrier in the transfer area, and the pressing mechanism prevents deformation of the transfer body when the transfer body comes into close contact with the toner image carrier. It is composed of
前記トナー像担持体としては、例えばベルト状の感光体
が用いられる。As the toner image carrier, for example, a belt-shaped photoreceptor is used.
トナー像担持体は、複数のローラ間に掛け回されており
、このトナー像担持体の搬送路の一部に、例えば径の大
きなドライブロールと径の小さなストリップロールを近
接して設け、両ロールの間に転写エリアが形成される。The toner image carrier is wound between a plurality of rollers, and a drive roll with a large diameter and a strip roll with a small diameter are provided close to each other in a part of the conveyance path of the toner image carrier. A transfer area is formed in between.
また、前記押圧させる機構は、例えば転写体を湾曲させ
てトナー像担持体に接触させ、転写体の復元力を利用し
て転写体をトナー像担持体に押圧させる機構が用いられ
る。The pressing mechanism may be, for example, a mechanism in which the transfer body is curved and brought into contact with the toner image carrier, and the restoring force of the transfer body is used to press the transfer body against the toner image carrier.
［作用］
この発明においては、押圧させる機構によって、転写体
をトナー像担持体に押圧することにより、転写体がトナ
ー像担持体に密着して搬送される際、変形した転写体の
変形部分が集中するのを防止する。こうすることによっ
て、転写体が不均一に変形していた場合でも、この転写
体の変形部分が集って転写体がトナー像担持体から浮上
って転写不良が発生するのを防止する。[Function] In this invention, by pressing the transfer member against the toner image carrier using the pressing mechanism, when the transfer member is conveyed in close contact with the toner image carrier, the deformed portion of the transfer member is deformed. Prevent concentration. By doing this, even if the transfer member is non-uniformly deformed, the deformed portions of the transfer member gather together to prevent the transfer member from floating up from the toner image carrier, thereby preventing transfer defects from occurring.
［実施例］ 以下にこの発明を図示の実施例に基づいて説明する。[Example] The present invention will be explained below based on illustrated embodiments.
第２図はこの発明に係る転写装置を適用し得る複写装置
を示すものである。図において、１はトナー像担持体と
してのベルト状の感光体であり、このベルト状感光体１
は、テンションロール２と、ドライブロール３と、スト
リップロール４とに掛け回され、矢印方向に回転駆動さ
れるようになっている。上記ベルト状感光体１は、チャ
ージコロトロン５によって一様に帯電された後、プラテ
ン６上に載置された原稿（図示せず）の画像が露光され
、ベルト状感光体１の表面に静電潜像が形成される。こ
の静電潜像は、ベルト状感光体１とともに移動し、現像
器７によって現像されてトナー像となり、ベルト状感光
体１の表面に形成されたトナー像は、転写エリアＡに送
られる。この転写エリア八には、後述するように転写コ
ロトロン８と剥離コロトロン９とが配置されており、ベ
ルト状感光体１上に形成されたトナー像を、転写コロト
ロン８の帯電によって転写体としての転写用紙１０上に
転写するとともに、剥離コロトロン９の帯電によって転
写用紙１０をベルト状感光体１から分離する。このベル
ト状感光体１から分離された転写用紙１０は、バキュー
ム式の搬送ベルト１１によって定着器１２に搬送され、
この定着器１２によってトナー像が定着された転写用紙
１０は、排出トレイ１３上に排出される。トナー像が転
写されたベルト状感光体１は、クリーナー１４によって
その表面が清掃され、次の複写工程に備える。FIG. 2 shows a copying apparatus to which the transfer apparatus according to the present invention can be applied. In the figure, 1 is a belt-shaped photoreceptor as a toner image bearing member, and this belt-shaped photoreceptor 1
is wound around a tension roll 2, a drive roll 3, and a strip roll 4, and is rotated in the direction of the arrow. After the belt-like photoreceptor 1 is uniformly charged by a charge corotron 5, an image of an original (not shown) placed on a platen 6 is exposed, and a static image is applied to the surface of the belt-like photoreceptor 1. A latent image is formed. This electrostatic latent image moves together with the belt-shaped photoreceptor 1 and is developed by a developing device 7 into a toner image, and the toner image formed on the surface of the belt-shaped photoreceptor 1 is sent to a transfer area A. In this transfer area 8, a transfer corotron 8 and a peeling corotron 9 are arranged as described later, and the toner image formed on the belt-shaped photoreceptor 1 is transferred as a transfer body by charging the transfer corotron 8. While transferring onto the paper 10, the transfer paper 10 is separated from the belt-shaped photoreceptor 1 by charging of the separation corotron 9. The transfer paper 10 separated from the belt-shaped photoreceptor 1 is transported to a fixing device 12 by a vacuum-type transport belt 11.
The transfer paper 10 on which the toner image has been fixed by the fixing device 12 is discharged onto the discharge tray 13. The surface of the belt-shaped photoreceptor 1 to which the toner image has been transferred is cleaned by a cleaner 14, and is ready for the next copying process.
ところで、上記転写用紙１０は、サイズ毎に異なった給
紙カセット１５．１６．１７に数百枚ないし数千枚とい
った単位で収容されており、所定のサイズの転写用紙１
０が給紙カセットからフィードベルト１８により給紙さ
れ、搬送ベルト１９及び搬送路２０を介してベルト状感
光体１の転写エリアＡに送られるようになっている。搬
送路２０は、複数の用紙ガイド２１．２１・・・と、転
写用紙１０の給紙タイミングを調節するレジストロール
とを備えている。By the way, the transfer paper 10 is stored in units of hundreds to thousands of sheets in paper feed cassettes 15, 16, and 17, which are different for each size.
0 is fed from a paper feed cassette by a feed belt 18 and sent to a transfer area A of the belt-shaped photoreceptor 1 via a conveyance belt 19 and a conveyance path 20. The conveyance path 20 includes a plurality of paper guides 21, 21, . . . and a registration roll that adjusts the paper feeding timing of the transfer paper 10.
ところで、この実施例における転写装置は、転写体を転
写エリアでトナー像担持体に押圧させる機構を備えてお
り、この押圧させる機構によって、転写体がトナー像担
持体に密着した際、転写体の変形を防止するようになっ
ている。すなわち、第１図に示すように、転写用紙１０
を転写エリアＡに導く用紙ガイド２１．２１は、ベルト
状感光体１側の先端部分２１ａ、２１ｂがドライブロー
ル３の周面と反対方向に湾曲している。上記用紙ガイド
２１ａ、２１ｂは、円弧状に湾曲した形状に形成されて
おり、上側の用紙ガイド２１ａより下側の用紙ガイド２
１ｂの方が半径が僅か大きくなっている。そして、両用
紙ガイド２１ａ１２１ｂの間には、狭い転写用紙１０の
搬送路２３が形成されており、転写用紙１０を転写エリ
ア八に搬送する際、円弧状に湾曲させるようになってい
る。By the way, the transfer device in this embodiment is equipped with a mechanism that presses the transfer body against the toner image carrier in the transfer area, and this pressing mechanism causes the transfer body to be pressed against the toner image carrier when the transfer body comes into close contact with the toner image carrier. It is designed to prevent deformation. That is, as shown in FIG.
The paper guide 21.21 that guides the paper to the transfer area A has tip portions 21a and 21b on the side of the belt-shaped photoreceptor 1 curved in a direction opposite to the circumferential surface of the drive roll 3. The paper guides 21a and 21b are formed in an arcuate shape, and the paper guide 2 on the lower side is lower than the paper guide 21a on the upper side.
1b has a slightly larger radius. A narrow conveyance path 23 for the transfer paper 10 is formed between the paper guides 21a121b, and the transfer paper 10 is curved into an arc when the transfer paper 10 is conveyed to the transfer area 8.
そのため、転写用紙１０は、転写エリアＡにおいてベル
ト状感光体１の表面に搬送される際、円弧状に変形する
ため、転写用紙１０は、それ自体の剛性によって平面状
に戻ろうとし、転写用紙１０の先端側がベルト状感光体
１の表面に押圧されるようになっている。Therefore, when the transfer paper 10 is conveyed to the surface of the belt-shaped photoreceptor 1 in the transfer area A, it is deformed into an arc shape, so the transfer paper 10 tends to return to a flat shape due to its own rigidity, and the transfer paper 10 The tip end side of the belt-shaped photoreceptor 1 is pressed against the surface of the belt-shaped photoreceptor 1.
以上の構成において、この実施例に係る転写装置では、
次のようにしてトナー像の転写が行なわれるようになっ
ている。すなわち、ベルト状感光体１上にトナー像が形
成され、表面にトナー像が形成されたベルト状感光体１
が転写エリアＡに移動すると、これと同期して所定サイ
ズの転写用紙１０が給紙カセット１５．１６．１７のい
ずれかから給紙される。この転写用紙１０は、フィード
ベルト１８により給紙カセット１５．１６．１７から送
り出され、搬送ベルト１９及び搬送路２０を介して、用
紙ガイド２１からベルト状感光体１の表面に供給される
。この転写用紙１０は、転写コロトロン８により帯電を
受けて、ベルト状感光体１上に静電的に吸着されて密着
するとともに、転写用紙１０上にベルト状感光体１から
トナー像が転写される。その後、転写用紙１０は、分離
コロトロン９により帯電を受けて除電され、ベルト状感
光体１との吸着力が弱められて、ストリップロール４の
曲率と転写用紙１０自体の剛性によって転写用紙１０が
ベルト状感光体１から分離される。In the above configuration, in the transfer device according to this embodiment,
The toner image is transferred as follows. That is, a toner image is formed on a belt-shaped photoreceptor 1, and the belt-shaped photoreceptor 1 has a toner image formed on its surface.
When the transfer paper 10 moves to the transfer area A, a transfer paper 10 of a predetermined size is simultaneously fed from one of the paper feed cassettes 15, 16, and 17. This transfer paper 10 is sent out from paper feed cassettes 15, 16, 17 by a feed belt 18, and is supplied to the surface of the belt-shaped photoreceptor 1 from a paper guide 21 via a transport belt 19 and a transport path 20. The transfer paper 10 is electrically charged by the transfer corotron 8 and is electrostatically attracted to the belt-shaped photoreceptor 1 and adheres to the belt-shaped photoreceptor 1, and the toner image is transferred from the belt-shaped photoreceptor 1 onto the transfer paper 10. . Thereafter, the transfer paper 10 is charged and neutralized by the separation corotron 9, the adhesion force with the belt-shaped photoreceptor 1 is weakened, and the transfer paper 10 is transferred to the belt due to the curvature of the strip roll 4 and the rigidity of the transfer paper 10 itself. It is separated from the photoreceptor 1.
ところで、転写用紙１０は、円弧状に湾曲した状態でベ
ルト状感光体１に送られるため、転写用紙１０は、それ
自体の剛性により平面状に戻ろうとするため、転写用紙
１０のベルト状感光体１と接触する部分は、ベルト状感
光体１の表面に押圧される。従って、転写用紙１０がそ
の周囲のみ吸湿して伸びていると、転写用紙１０の送り
方向に対して直交する幅方向の中央部に比べて、両端部
の用ｔｉＩｉ１０の長さが第４図に示すように長くなる
ため、相対的に転写用紙１０の中央部より両端部の搬送
が遅れる。そのため、転写用紙１０が先端側から順次送
られベルト状感光体１に静電的に吸着して搬送される際
に、転写用紙１０の中央部のみ速く送られ、両端部の搬
送が遅れるため、転写用紙１０の後端部においては、そ
の中央部が先端側へ引張られ、両端部が中央部へ移動し
て変形が集められる傾向が生じる。しかし、転写用紙１
０は、上記のごとくベルト状感光体１の表面に押圧され
ているため、転写用紙１０の後端部において、変形部を
集めるような力が生じても転写用紙１０を押圧する力が
これに勝り、転写用ｍｉｏの変形部が集ることはない。By the way, since the transfer paper 10 is sent to the belt-shaped photoreceptor 1 in a curved state, the transfer paper 10 tends to return to a flat shape due to its own rigidity, so that the belt-shaped photoreceptor of the transfer paper 10 1 is pressed against the surface of the belt-shaped photoreceptor 1. Therefore, if the transfer paper 10 absorbs moisture and expands only around its periphery, the length of the paper tiIi 10 at both ends becomes as shown in FIG. As shown, since the transfer paper 10 is longer, the conveyance of both ends of the transfer paper 10 is relatively delayed compared to the center part. Therefore, when the transfer paper 10 is sequentially fed from the leading edge side and is electrostatically attracted to the belt-shaped photoreceptor 1 and transported, only the center portion of the transfer paper 10 is fed quickly, and the transportation of both ends is delayed. At the rear end of the transfer paper 10, the central part is pulled toward the leading end, and both ends tend to move toward the central part to collect the deformation. However, transfer paper 1
0 is pressed against the surface of the belt-shaped photoreceptor 1 as described above, so even if a force that collects the deformed portion is generated at the rear end of the transfer paper 10, the force that presses the transfer paper 10 will not be applied to this force. In addition, the deformed parts of the transfer mio do not gather together.
従って、転写用紙１ｏの中央部がベルト状感光体１の表
面から浮上ることはなく、転写不良が発生するのを防止
することができる。Therefore, the center portion of the transfer paper 1o does not float above the surface of the belt-shaped photoreceptor 1, and it is possible to prevent transfer defects from occurring.
このように、転写体を転写エリアでトナー像担持体に押
圧させることにより、転写不良が発生ずるのを防止でき
るため、ベルト状の感光体１を用いた複写機等において
、転写用紙１０が不均一に吸湿して変形した場合でも、
転写用紙１０に転写される画像に欠は等が生じることが
なく、常に高品質の画像を得ることができる。In this way, by pressing the transfer member against the toner image carrier in the transfer area, it is possible to prevent transfer defects from occurring. Even if it absorbs moisture uniformly and becomes deformed,
There are no defects in the image transferred to the transfer paper 10, and a high-quality image can always be obtained.
本発明者は、第５図に示すような装置を試作し、転写不
良の発生の有無を調べる実験を行なった。The present inventor prototyped a device as shown in FIG. 5 and conducted an experiment to determine whether or not transfer defects occurred.
図において、Ｒは転写用紙１０の湾曲形状を示す曲率半
径、Ｌは転写用紙１０を湾曲させる部分の長さ、Ｄは転
写用紙１０とベルト状感光体１との接点を示している。In the figure, R indicates the radius of curvature indicating the curved shape of the transfer paper 10, L indicates the length of the curved portion of the transfer paper 10, and D indicates the contact point between the transfer paper 10 and the belt-shaped photoreceptor 1.
そして、上記曲率半径Ｒと湾曲部の長さしとを種々変化
させ、転写不良の発生を防止できる範囲を求めた。その
際、ドライブロール３としては、直径４８ｍ１のロール
を、ストリップロール４としては、直径２２１Ｍのロー
ルを用いた。このような装置において、６０ｇ／ｍ２の
Ａ３の転写用紙１０を、２８℃、８５％ＲＨの環境下で
多数枚積重ねて３日間放置し、上から１００枚目以降の
転写用紙を用いて画像の転写を行なった。画像転写の良
不良の評価は、１０ｆｌｙ１間隔のラインチャートを用
紙の搬送方向と直交する方向に形成し、このラインチャ
ートに欠けやかすれ等がどの程度の長さにわたって生じ
たかによって行なった。第６図及び第７図は上記実験の
効果を示すものである。Then, the radius of curvature R and the length of the curved portion were varied to find a range in which the occurrence of transfer defects could be prevented. At that time, as the drive roll 3, a roll with a diameter of 48 m1 was used, and as the strip roll 4, a roll with a diameter of 221M was used. In such a device, a large number of 60 g/m2 A3 transfer papers are stacked in an environment of 28°C and 85% RH and left for three days, and images are transferred using the 100th and subsequent transfer papers from the top. Transcription was performed. The quality of the image transfer was evaluated by forming a line chart at intervals of 10 fly 1 in a direction perpendicular to the conveyance direction of the paper, and determining how long the line chart had chipping, blurring, etc. FIGS. 6 and 7 show the effects of the above experiment.
実験の結果、第６図のＣの範囲であれば、転写不良の発
生を防止できることがわかった。これを式であられずと
、次のようになる。As a result of experiments, it was found that within the range C in FIG. 6, the occurrence of transfer defects could be prevented. If this cannot be expressed as a formula, it becomes as follows.
Ｌ−１〜１．５７Ｒ
また、第７図から明らかなように、従来の＠置は、不均
一に吸湿した転写用紙によって画像を形成した場合、そ
の後端部に１５０ｓｔ程度の抜けが生じたが、この実験
例の場合には、後端部の抜は同が４５順以下であり、大
幅に転写不良の発生を防止できることがわかった。L-1~1.57R Also, as is clear from Fig. 7, in the conventional @ placement, when an image was formed using transfer paper that had unevenly absorbed moisture, a gap of about 150 strokes occurred at the trailing edge. In the case of this experimental example, the removal of the rear end was 45 or less, and it was found that the occurrence of transfer defects could be largely prevented.
［発明の効果コ
この発明は以上の構成及び作用よりなるもので、転写体
が不均一に吸湿して変形した場合でも、転写不良が発生
するのを防止することができる。[Effects of the Invention] The present invention has the above-described structure and operation, and even if the transfer body absorbs moisture non-uniformly and is deformed, it is possible to prevent transfer defects from occurring.
第１図はこの発明に係る転写装置の一実施例を示す断面
構成図、第２図はこの発明に係る転写装置を適用した複
写機を示す概略構成図、第３図は第１図の実施例の作用
を示す説明図、第４図は変形した転写用紙を示す平面図
、第５図は同実施例の構成を示す模式図、第６図及び第
７図は同実施例の作用をそれぞれ示すグラフ、第８図は
従来の転写装置を示す断面構成図、第９図は転写不良を
示す説明図、第１０図は転写不良が発生する状態を示す
説明図である。
［符号の説明］
１・・・ベルト状感光体
２・・・デンションロール
３・・・ドライブロール
４・・・ストリップロール
２１ａ、２１ｂ・・・用紙ガイド（押圧させる機構）Ａ
・・・転写エリア
特 許 出 願 人 富士ゼロックス株式会社代 理
人 弁理士 中村 智廣（外２名）１・・・ベルト
状感光体
３・・・ドライブ０−ル
４・・・ストリップロール
２１ａ、２１ｂ・・・用紙ガイド
Ａ・・・転写エリア
２・・・アイドルロール
第２図
第３図
第４図
第６図
第７図
−ＲFIG. 1 is a cross-sectional configuration diagram showing an embodiment of a transfer device according to the present invention, FIG. 2 is a schematic configuration diagram showing a copying machine to which the transfer device according to the invention is applied, and FIG. 3 is an implementation of FIG. 1. FIG. 4 is a plan view showing the deformed transfer paper, FIG. 5 is a schematic diagram showing the configuration of the embodiment, and FIGS. 6 and 7 are diagrams showing the action of the embodiment, respectively. 8 is a cross-sectional configuration diagram showing a conventional transfer device, FIG. 9 is an explanatory diagram showing a transfer defect, and FIG. 10 is an explanatory diagram showing a state in which a transfer defect occurs. [Description of symbols] 1... Belt-shaped photoreceptor 2... Dension roll 3... Drive roll 4... Strip rolls 21a, 21b... Paper guide (pressing mechanism) A
...Transfer area patent applicant Fuji Xerox Co., Ltd. Representative Patent attorney Tomohiro Nakamura (2 others) 1... Belt-shaped photoconductor 3... Drive 0-ru 4... Strip roll 21a , 21b... Paper guide A... Transfer area 2... Idle roll Fig. 2 Fig. 3 Fig. 4 Fig. 6 Fig. 7-R
Claims (2)
像担持体に、転写体を転写エリアで密着させ、前記トナ
ー像担持体からトナー像を転写体に電気的に転写する転
写装置において、前記転写体を転写エリアでトナー像担
持体に押圧させる機構を備え、前記押圧させる機構によ
つて、転写体がトナー像担持体に密着した際、転写体の
変形を防止するようにしたことを特徴とする転写装置。(1) In a transfer device in which a transfer member is brought into close contact with a belt-shaped toner image carrier stretched between a plurality of rollers in a transfer area, and a toner image is electrically transferred from the toner image carrier to the transfer member. and a mechanism for pressing the transfer body against the toner image carrier in the transfer area, and the pressing mechanism prevents deformation of the transfer body when the transfer body comes into close contact with the toner image carrier. A transcription device featuring:
ー像担持体に接触させ、転写体の復元力を利用して転写
体をトナー像担持体に押圧させる機構からなることを特
徴とする特許請求の範囲第１項記載の転写装置。(2) The pressing mechanism is characterized by comprising a mechanism that curves the transfer body, brings it into contact with the toner image carrier, and presses the transfer body against the toner image carrier using the restoring force of the transfer body. A transfer device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62251587A JP2671318B2 (en) | 1987-10-07 | 1987-10-07 | Transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62251587A JP2671318B2 (en) | 1987-10-07 | 1987-10-07 | Transfer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0194372A true JPH0194372A (en) | 1989-04-13 |
| JP2671318B2 JP2671318B2 (en) | 1997-10-29 |
Family
ID=17225032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62251587A Expired - Fee Related JP2671318B2 (en) | 1987-10-07 | 1987-10-07 | Transfer device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2671318B2 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5571356U (en) * | 1978-11-07 | 1980-05-16 | ||
| JPS5616158U (en) * | 1979-07-16 | 1981-02-12 | ||
| JPS6034111A (en) * | 1983-08-05 | 1985-02-21 | 株式会社クボタ | Bag opening apparatus of grain bogging apparatus |
| JPS6063861U (en) * | 1983-10-08 | 1985-05-04 | 株式会社リコー | Copy machine transfer device |
| JPS619631A (en) * | 1984-06-25 | 1986-01-17 | Seiko Koki Kk | Electromagnetically driven shutter in camera |
| JPS6293154A (en) * | 1985-10-17 | 1987-04-28 | Fuji Xerox Co Ltd | Transfer paper guide in electrophotographic copying machine |
| JPS6274259U (en) * | 1985-10-28 | 1987-05-12 |
-
1987
- 1987-10-07 JP JP62251587A patent/JP2671318B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5571356U (en) * | 1978-11-07 | 1980-05-16 | ||
| JPS5616158U (en) * | 1979-07-16 | 1981-02-12 | ||
| JPS6034111A (en) * | 1983-08-05 | 1985-02-21 | 株式会社クボタ | Bag opening apparatus of grain bogging apparatus |
| JPS6063861U (en) * | 1983-10-08 | 1985-05-04 | 株式会社リコー | Copy machine transfer device |
| JPS619631A (en) * | 1984-06-25 | 1986-01-17 | Seiko Koki Kk | Electromagnetically driven shutter in camera |
| JPS6293154A (en) * | 1985-10-17 | 1987-04-28 | Fuji Xerox Co Ltd | Transfer paper guide in electrophotographic copying machine |
| JPS6274259U (en) * | 1985-10-28 | 1987-05-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2671318B2 (en) | 1997-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03232638A (en) | Picture forming device | |
| JPH04149570A (en) | Image forming device | |
| US5211388A (en) | Retard roll enhancement | |
| JPH0990685A (en) | Thick paper feeding method and image forming device using the same | |
| JPH0546031A (en) | Device for guiding paper to transfer material carrier | |
| JPH0194372A (en) | Transfer device | |
| JP2762493B2 (en) | Transfer device | |
| JP3037387B2 (en) | Image forming device | |
| JP3176221B2 (en) | Image forming device | |
| JP3762147B2 (en) | Sheet feeding and conveying apparatus and image forming apparatus | |
| JPH04133084A (en) | Transfer device | |
| JP2722265B2 (en) | Electrophotographic copying machine | |
| JP2605740B2 (en) | Transfer device | |
| JPS63300271A (en) | Copying paper static eliminating device for image forming device | |
| JP2001233529A (en) | Sheet feeder | |
| JPS63116179A (en) | Electrostatic recorder with sheet separating device | |
| JP2570091Y2 (en) | Paper transport device in electrostatic printing device | |
| JP2000214691A (en) | Transfer device in image forming device | |
| JP3043563B2 (en) | Image forming device | |
| JPS63142364A (en) | Electrophotographic printer | |
| JPH06266256A (en) | Thermal fixing device | |
| JPH052993B2 (en) | ||
| JPH02129676A (en) | Image transfer device | |
| JPH0511624A (en) | Electrophotographic device | |
| JPH10282745A (en) | Image forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |